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#!/usr/bin/env python
# Copyright (c) 2016 ZTE Corp and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
"""Define the parent classes of all Xtesting Features.
Feature is considered as TestCase offered by Third-party. It offers
helpers to run any python method or any bash command.
"""
import abc
import logging
import os
import subprocess
import sys
import time
from xtesting.core import testcase
__author__ = ("Serena Feng <feng.xiaowei@zte.com.cn>, "
"Cedric Ollivier <cedric.ollivier@orange.com>")
class Feature(testcase.TestCase, metaclass=abc.ABCMeta):
"""Base model for single feature."""
__logger = logging.getLogger(__name__)
@abc.abstractmethod
def execute(self, **kwargs):
"""Execute the Python method.
The subclasses must override the default implementation which
is false on purpose.
The new implementation must return 0 if success or anything
else if failure.
Args:
kwargs: Arbitrary keyword arguments.
"""
def run(self, **kwargs):
"""Run the feature.
It allows executing any Python method by calling execute().
It sets the following attributes required to push the results
to DB:
* result,
* start_time,
* stop_time.
It doesn't fulfill details when pushing the results to the DB.
Args:
kwargs: Arbitrary keyword arguments.
Returns:
TestCase.EX_OK if execute() returns 0,
TestCase.EX_RUN_ERROR otherwise.
"""
self.start_time = time.time()
exit_code = testcase.TestCase.EX_RUN_ERROR
self.result = 0
try:
if self.execute(**kwargs) == 0:
exit_code = testcase.TestCase.EX_OK
self.result = 100
except Exception: # pylint: disable=broad-except
self.__logger.exception("%s FAILED", self.project_name)
self.stop_time = time.time()
return exit_code
class BashFeature(Feature):
"""Class designed to run any bash command."""
__logger = logging.getLogger(__name__)
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.result_file = "{}/{}.log".format(self.res_dir, self.case_name)
def execute(self, **kwargs):
"""Execute the cmd passed as arg
Args:
kwargs: Arbitrary keyword arguments.
Returns:
0 if cmd returns 0,
non-zero in all other cases.
"""
try:
cmd = kwargs["cmd"]
console = kwargs["console"] if "console" in kwargs else False
# For some tests, we may need to force stop after N sec
max_duration = kwargs.get("max_duration")
if not os.path.isdir(self.res_dir):
os.makedirs(self.res_dir)
with open(self.result_file, 'w') as f_stdout:
self.__logger.info("Calling %s", cmd)
with subprocess.Popen(
cmd, shell=True, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT) as process:
for line in iter(process.stdout.readline, b''):
if console:
sys.stdout.write(line.decode("utf-8"))
f_stdout.write(line.decode("utf-8"))
try:
process.wait(timeout=max_duration)
except subprocess.TimeoutExpired:
process.kill()
self.__logger.info(
"Killing process after %d second(s).",
max_duration)
return -2
with open(self.result_file, 'r') as f_stdin:
self.__logger.debug("$ %s\n%s", cmd, f_stdin.read().rstrip())
return process.returncode
except KeyError:
self.__logger.error("Please give cmd as arg. kwargs: %s", kwargs)
return -1
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